Problemset - Codeforces

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Codeforces Round #678 (Div. 2)
07:56:39
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dsu

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Problems

#	Name
1433D	Districts Connection constructive algorithms, dfs and similar, dsu	1200	x10056
1423H	Virus data structures, divide and conquer, dsu, graphs	2500	x219
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x404
1408E	Avoid Rainbow Cycles data structures, dsu, graphs, greedy, sortings, trees	2400	x1232
1416D	Graph and Queries data structures, dsu, graphs, implementation, trees	2600	x785
1419F	Rain of Fire binary search, data structures, dfs and similar, dsu, graphs, implementation	2800	x293
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x658
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x467
1383A	String Transformation 1 dsu, graphs, greedy, sortings, strings, trees, two pointers	1700	x7291
1386C	Joker *special problem, bitmasks, data structures, divide and conquer, dsu	2800	x134
1385G	Columns Swaps 2-sat, dfs and similar, dsu, graphs, implementation	2300	x766
1380E	Merging Towers data structures, dsu, implementation, trees	2300	x1198
1370D	Odd-Even Subsequence binary search, dp, dsu, greedy, implementation	2000	x5939
1365D	Solve The Maze constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths	1700	x8870
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x868
1344B	Monopole Magnets constructive algorithms, dfs and similar, dsu, graphs	2000	x4523
1335F	Robots on a Grid data structures, dfs and similar, dsu, graphs, greedy, matrices	2200	x1433
1332C	K-Complete Word dfs and similar, dsu, greedy, implementation, strings	1500	x10583
1305G	Kuroni and Antihype bitmasks, brute force, dp, dsu, graphs	3500	x238
1307F	Cow and Vacation dfs and similar, dsu, trees	3300	x252
1303F	Number of Components dsu, implementation	2800	x300
1290C	Prefix Enlightenment dfs and similar, dsu, graphs	2400	x964
1292A	NEKO's Maze Game data structures, dsu, implementation	1400	x9774
1278D	Segment Tree data structures, dsu, graphs, trees	2100	x2472
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x3050
1263D	Secret Passwords dfs and similar, dsu, graphs	1500	x7477
1254E	Send Tree to Charlie combinatorics, dfs and similar, dsu, trees	3300	x113
1253F	Cheap Robot binary search, dsu, graphs, shortest paths, trees	2500	x690
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x5614
1242B	0-1 MST dfs and similar, dsu, graphs, sortings	1900	x4043
1245D	Shichikuji and Power Grid dsu, graphs, greedy, shortest paths, trees	1900	x3686
1249B2	Books Exchange (hard version) dfs and similar, dsu, math	1300	x10286
1249B1	Books Exchange (easy version) dsu, math	1000	x13423
1236E	Alice and the Unfair Game binary search, data structures, dp, dsu	2500	x441
1220E	Tourism dfs and similar, dp, dsu, graphs, greedy, trees	2200	x1674
1209G1	Into Blocks (easy version) data structures, dsu, greedy, implementation, two pointers	2000	x1937
1209D	Cow and Snacks dfs and similar, dsu, graphs	1700	x5164
1217F	Forced Online Queries Problem data structures, divide and conquer, dsu, graphs, trees	2600	x252
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	1800	x3331
1213F	Unstable String Sort data structures, dfs and similar, dsu, graphs, greedy, implementation, strings	2100	x1524
1184E3	Daleks' Invasion (hard) data structures, dsu, graphs, trees	2400	x300
1176E	Cover it! dfs and similar, dsu, graphs, shortest paths, trees	1700	x5262
1166F	Vicky's Delivery Service data structures, dsu, graphs, hashing	2400	x401
1167C	News Distribution dfs and similar, dsu, graphs	1400	x8643
1156E	Special Segments of Permutation data structures, divide and conquer, dsu, two pointers	2200	x1480
1156D	0-1-Tree dfs and similar, divide and conquer, dp, dsu, trees	2200	x1958
1140F	Extending Set of Points data structures, divide and conquer, dsu	2600	x405
1139C	Edgy Trees dfs and similar, dsu, graphs, math, trees	1500	x7399
1133F2	Spanning Tree with One Fixed Degree constructive algorithms, dfs and similar, dsu, graphs, greedy	1900	x1738
1120D	Power Tree dfs and similar, dp, dsu, graphs, greedy, trees	2500	x487
1130C	Connect brute force, dfs and similar, dsu	1400	x5762
1131F	Asya And Kittens constructive algorithms, dsu	1700	x4153
1131D	Gourmet choice dfs and similar, dp, dsu, graphs, greedy	2000	x2255
1107G	Vasya and Maximum Profit binary search, constructive algorithms, data structures, dp, dsu	2400	x645
1108F	MST Unification binary search, dsu, graphs, greedy	2100	x1501
1095F	Make It Connected dsu, graphs, greedy	1900	x2921
1081D	Maximum Distance dsu, graphs, shortest paths, sortings	1800	x2496
1055B	Alice and Hairdresser dsu, implementation	1300	x3548
1044D	Deduction Queries data structures, dsu	2400	x583
1051G	Distinctification data structures, dsu, greedy	2900	x123
1042F	Leaf Sets data structures, dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x845
1039C	Network Safety dfs and similar, dsu, graphs, math, sortings	2200	x984
1027F	Session in BSU binary search, dfs and similar, dsu, graph matchings, graphs	2400	x847
1023F	Mobile Phone Network dfs and similar, dsu, graphs, trees	2600	x542
1012E	Cycle sort dsu, math	3100	x130
1012B	Chemical table constructive algorithms, dfs and similar, dsu, graphs, matrices	1900	x2667
1009F	Dominant Indices data structures, dsu, trees	2300	x1780
990G	GCD Counting divide and conquer, dp, dsu, number theory, trees	2400	x859
986C	AND Graph bitmasks, dfs and similar, dsu, graphs	2500	x1362
982D	Shark brute force, data structures, dsu, trees	1900	x1693
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1087
977E	Cyclic Components dfs and similar, dsu, graphs	1500	x9082
962G	Visible Black Areas data structures, dsu, geometry, trees	2800	x73
959B	Mahmoud and Ehab and the message dsu, greedy, implementation	1200	x6431
936E	Iqea data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees	3400	x120
939D	Love Rescue dfs and similar, dsu, graphs, greedy, strings	1600	x4647
938G	Shortest Path Queries bitmasks, data structures, dsu, graphs	2900	x299
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x2930
920E	Connected Components? data structures, dfs and similar, dsu, graphs	2100	x2795
915F	Imbalance Value of a Tree data structures, dsu, graphs, trees	2400	x1076
902B	Coloring a Tree dfs and similar, dsu, greedy	1200	x7046
901C	Bipartite Segments binary search, data structures, dfs and similar, dsu, graphs, two pointers	2300	x819
899E	Segments Removal data structures, dsu, flows, implementation, two pointers	2000	x1594
896E	Welcome home, Chtholly data structures, dsu	3100	x397
891C	Envy data structures, dsu, graphs	2300	x1098
886C	Petya and Catacombs dsu, greedy, implementation, trees	1300	x4608
884E	Binary Matrix dsu	2500	x396
875F	Royal Questions dsu, graphs, greedy	2500	x741
875B	Sorting the Coins dsu, implementation, sortings, two pointers	1500	x4342
870E	Points, Lines and Ready-made Titles dfs and similar, dsu, graphs, trees	2300	x735
873F	Forbidden Indices dsu, string suffix structures, strings	2400	x612
859E	Desk Disorder combinatorics, dfs and similar, dsu, graphs, trees	2100	x1161
843A	Sorting by Subsequences dfs and similar, dsu, implementation, math, sortings	1400	x4439
817D	Imbalanced Array data structures, divide and conquer, dsu, sortings	1900	x2204
813F	Bipartite Checking data structures, dsu, graphs	2500	x389
811E	Vladik and Entertaining Flags data structures, dsu, graphs	2600	x475
788B	Weird journey combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2100	x1763
771A	Bear and Friendship Condition dfs and similar, dsu, graphs	1500	x8615
778C	Peterson Polyglot brute force, dfs and similar, dsu, hashing, strings, trees	2500	x644
776D	The Door Problem 2-sat, dfs and similar, dsu, graphs	2000	x2858

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